Control & Relay Panel
Power Resistors
Cubicles
Traction Resistors
Bus Duct
Crane/ Motor
   Control Resistors
Cable Tray
Fabricated Items
 
 
 
Basic Parameters for Resistors Design ConsiderationConstruction of a Resistance Unit
Characteristics of Different types of Material used for of Resistance
Different Types of Resistance Grids
 
  PSS FSS WW EW
Material 304/406/410
304/410/316L
304/316L/Nichrome/
Cu-Nickel
406
Mounting Rigid Rigid Rigid Floating
Insulation Micanite/Ceramic
Micanite Segmented Ceramic
Ceramic
Resistivity microohm-cm 304-72
406-122
410-57
304-72
410-57
304-72
Nichrome - 108
122
Temperature co-efficient/°C
304-0.0009
406-0.00014
304-0.0009
410-0.0014
Nichrome – 0.00011
Cu Nickel – 7.25
316L
0.00014
Design Temp. rise °C 740 °C
740 °C 375 °C 550 °C
Material Density 340-8.06 gm/cc
406-7.30 gm/cc
410-7.75 gm/cc
340-8.06 gm/cc
406-7.30 gm/cc
410-7.75 gm/cc
Cu Nickel
Nichrome – 7.25
316L
7.3
Specific Heat 0.11 0.11 0.11 0.11
Change of Resistance with Temp. per 100 °C
406-1.4 %, 304 & 410 – 8% 8% 8% 1.4 %
Mechanical Strength Unbreakable Unbreakable Unbreakable Unbreakable
 
 
 
 
 
 
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